[PATCH] D58821: Inline asm constraints: allow ICE-like pointers for the "n" constraint (PR40890)

Hans Wennborg via Phabricator via cfe-commits cfe-commits at lists.llvm.org
Fri Mar 1 05:27:35 PST 2019

hans created this revision.
hans added reviewers: efriedma, rnk, rsmith, void.
Herald added subscribers: jdoerfert, eraman.

Apparently GCC allows this, and there's code relying on it (see bug, which is a release blocker for llvm 8).

The idea is to allow expression that would have been allowed if they were cast to int. So I based the code on how such a cast would be done (the CK_PointerToIntegral case in IntExprEvaluator::VisitCastExpr()).

I'm unfamiliar with this code, especially the LValue variant of APValue, so please take a careful look.



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